#### Summer Clouds

19/05/2017 at 09:03-
The edge of the square is : \(\sqrt{9}=3\) (cm)

Hence,the diagonal OH of the square or the radius of the semicircle is \(3\sqrt{2}\)cm.

The area of the semicircle is : \(\dfrac{\left(3\sqrt{2}\right)^2\pi}{2}=9\pi\)(cm

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Nguyễn Thị Thu Thủy 19/05/2017 at 20:35
*The edge of the square is :**(cm)**Hence,the diagonal OH of the square or the radius of the semicircle is**cm.**The area of the semicircle is :**(cm2)*